I updated my old theme with the latest. Now my site is broken. Cant read any fonts. Revslider file is totally gone. Not sure what to do next except apologize to my client
Please, go to Theme options, save changes, and check if the problem persists.
Moreover, edit the page with a Slider Revolution, check if the slider is selected, update the page, and see if it appears on this page.
If this will not resolve the problem, please, attach a link to your website so that I can take a closer look at it.